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Optical Engineering

Quantitative Shadow Method For Measuring A One-Dimensional Refractive Index Distribution
Author(s): Robert W. Lewis
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Paper Abstract

A quantitative shadow method was developed and tested by measuring the one-dimensional refractive index distribution of a polished slab of gradient index glass. Tests made on the known glass sample showed that a one-dimensional index distribution can be measured by shadowgraphy to better than 1% accuracy. The method uses simple optics and can easily be auto-mated to perform rapid measurements. Extension of the shadow method to more general distributions requires making many traverses of the refractive index distribution with a narrow sheet of light.

Paper Details

Date Published: 1 December 1985
PDF: 5 pages
Opt. Eng. 24(6) 241093 doi: 10.1117/12.7973635
Published in: Optical Engineering Volume 24, Issue 6
Show Author Affiliations
Robert W. Lewis, GM Research Laboratories (United States)

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